JP2011107788A - Portable terminal and input control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable terminal which can reduce occurrence of malfunction based on an input from a touchpad. <P>SOLUTION: The portable terminal includes the touchpad which outputs a value indicating a degree of contact upon detection of contact, holds a first threshold for determining a target range in which processing to be executed is assigned and a second threshold which is less than the first threshold, calculates a value indicating a degree of the contact of the range for each range wherein the contact on the touchpad is detected on the basis of a value indicating the degree of the contact output from the touchpad, decides one range wherein the calculated value is greater than or equal to the first threshold as the target range when the number of ranges where the calculated value is greater than or equal to the second threshold among the ranges where the contact is detected on the touchpad is under a default value, and does not decide the target range when the number of ranges wherein the computed values are greater than or equal to the second threshold is equal to or greater than the default value. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mobile terminal such as a mobile phone having a touch pad, and more particularly to a control technique related to processing execution based on an input from a touch pad.

A portable terminal such as a mobile phone that can be operated by a touchpad detects a contact range on the touchpad based on a value indicating the degree of contact on the touchpad (for example, a value indicating capacitance), and The process assigned to the contact area is executed.
Therefore, for example, when a part of the body other than the user's finger or the like comes into contact with the touch pad (hereinafter referred to as “miscontact”), a process unintended by the user is performed (hereinafter, “ The problem of “malfunction” may occur.

For this problem, it is determined whether or not the contact range on the touchpad exceeds a predetermined area value, and if it exceeds the predetermined area value, control is performed so that processing based on this contact is not performed. A method is known (for example, Patent Document 1).
Thereby, for example, as the above-mentioned predetermined area value, an area value that becomes a boundary between an area value when a user's finger or the like is brought into contact with an area value when a part of the body other than the finger or the like is brought into contact By setting, even when a part of the user's body other than a finger or the like is accidentally touched, malfunction can be prevented.

JP 2004-126752 A

When preventing malfunction by using the method of Patent Document 1, a range in which a value indicating a degree of contact on the touch pad (a value indicating capacitance, etc.) exceeds a predetermined threshold is set as a touch range of the touch pad. It can be considered to determine whether or not the above-mentioned predetermined area value is exceeded.
However, depending on the manner of contact, for example, there may be a case where the area of the contact range gradually increases with the passage of time, but in the method of Patent Document 1, the contact range is determined at the above-described determination timing. If the area does not exceed the predetermined area value, such a malfunction due to contact of the case cannot be prevented.

  Therefore, the present invention has been made in view of such problems, and an object thereof is to provide a mobile terminal such as a mobile phone that can reduce the occurrence of malfunctions based on input from a touch pad.

  In order to solve the above-described problems, when a contact is detected, the mobile terminal according to the present invention outputs a value indicating the degree of contact, and a value indicating the degree of contact output from the touch pad. For each range in which contact is detected on the touchpad, a calculation unit that calculates a value indicating the degree of contact in the range and a target range to which a process to be executed is assigned are determined. Of the range in which contact is detected on the touch pad and the holding unit that holds the first threshold value and the second threshold value that is smaller than the first threshold value, the value calculated by the calculating unit is equal to or greater than the second threshold value. When the number of ranges is less than a predetermined value, one range in which the value calculated by the calculation unit is equal to or greater than a first threshold is determined as a target range, and the value calculated by the calculation unit is a second value. In a range that is greater than or equal to the threshold There when it is more than the default value, characterized in that it comprises a determining unit not to perform the determination of the target range.

  Here, the contact refers to a state in which a user's finger, face or other body or touch pen is in contact with the touch pad, and particularly in a capacitive touch pad, the user's finger or face or other body or touch pen. For example, a device that changes the capacitance of the touchpad includes a state in which the touchpad is close to the touchpad until the capacitance of the touchpad is changed by a predetermined amount or more.

  According to the mobile terminal according to the present invention having the above-described configuration, it is possible to reduce the occurrence of malfunctions based on input from the touch pad.

1 is a perspective view showing an external appearance of a closed state of a mobile phone 100 according to Embodiment 1. FIG. 1 is a perspective view showing an external appearance of mobile phone 100 according to Embodiment 1 in an opened state. 1 is a front view showing an external appearance of a closed state of a mobile phone 100 according to Embodiment 1. FIG. 3 is a block diagram showing a functional configuration of a main part of the mobile phone 100. FIG. It is a figure for demonstrating the change of the key contact value which the calculation part 111 calculates. 4 is a flowchart showing a control process of the mobile phone 100 in response to an input from a touch pad 102. It is a figure which shows the example of a change of the key contact value of 4 keys, 5 keys, 1 key, 2 keys, and 7 keys. It is a figure which shows the example of a change of the key contact value of 4 keys, 5 keys, 1 key, 7 keys, and 8 keys. It is a figure which shows the example of a change of the key contact value of 5 keys and 0 keys. 10 is a flowchart showing a control process of the modified mobile phone in response to an input from the touch pad 102. 6 is a block diagram showing a functional configuration of a main part of a mobile phone 200 according to Embodiment 2. FIG. 4 is a flowchart showing a control process of the mobile phone 200 in response to an input from the touch pad 102. 13 is a flowchart showing a corresponding process of a target key of the mobile phone 200 (step S31 in FIG. 12).

A mobile phone as an embodiment of a mobile terminal according to the present invention will be described below.
<< Embodiment 1 >>
<Appearance>
1 is a perspective view showing an external appearance of mobile phone 100 according to Embodiment 1 in a closed state, and FIG. 2 is a perspective view showing an external appearance of mobile phone 100 according to Embodiment 1 in an opened state. FIG. 3 is a front view showing the appearance of mobile phone 100 according to Embodiment 1 in a closed state.

As shown in FIGS. 1 and 2, the mobile phone 100 is a side-opening type foldable mobile phone, and includes a housing 1 having an input key 3 and an LCD (Liquid Crystal Display) 4 serving as an information display screen. The housing 2 having the structure can be opened and closed with each other.
Although not shown in FIG. 1, as shown in FIG. 3, the mobile phone 100 includes a sub LCD 101 and a touch pad 102 on the surface of the housing 2 exposed to the outside in a closed state.

Marks indicating various keys are visibly arranged on the touch pad 102, and the user performs processing assigned to the key indicated by the mark by bringing a finger or the like into contact with the mark. Can be done.
Note that the alternate long and short dash line in FIG. 8 is described for indicating the range of each key (for example, about 5 mm × 10 mm) for the sake of explanation, and is not actually visible. In the following, for example, a key indicated by a mark “1” is expressed as “1 key”, and keys indicated by other marks are also expressed in the same manner.

Further, the types of keys and the arrangement order of the keys shown in the figure are examples, and can be changed as appropriate.
Further, in the present embodiment, the contact refers to a state in which a user's finger, face or other body, a touch pen, or the like is in contact with the touch pad, or a user's finger, face or other body, a touch pen, or the like. What changes the capacitance includes a state where the touch pad is close until a later-described key contact value (see FIG. 5) becomes equal to or higher than the GND level.

Further, in the following description, when a user touches the touch pad 102 with a finger or the like and selects a key on the touch pad 102, it is also referred to as pressing a key.
<Configuration>
FIG. 4 is a block diagram showing a functional configuration of main parts of the mobile phone 100.
The mobile phone 100 includes a sub LCD 101, a touch pad 102, a communication unit 103, a speaker 104, a microphone 105, a vibrator 106, a control unit 110, and an application execution unit 120, as shown in FIG.

Note that the mobile phone 100 includes a processor and a memory, and each function of the control unit 110 and the application execution unit 120 is realized by the above-described processor executing a program stored in the above-described memory. In this memory, it is assumed that various threshold values described later are also stored.
Here, the sub LCD 101 has a function of displaying an image such as a character in response to an instruction from the control unit 110.

  The touch pad 102 is realized by a general electrostatic capacitance type touch sensor, and detects a contact by a user. During the detection, the coordinate value (x of the contact position) is detected every unit time (for example, 25 ms). , Y) and a circuit for sending a set of values for expressing the capacitance to the control unit 110. In particular, when a plurality of positions are in contact, a plurality of the above-described sets are sent. .

As an example, the coordinate value of the upper left vertex of the touch pad 102 indicated by the dotted rectangle in FIG. 3 is (0, 0), and the coordinate value of the lower right vertex is (160, 220). .
The communication unit 103 is a circuit that transmits and receives radio waves to and from the base station via an antenna. The communication unit 103 demodulates the received signal and transmits it to the control unit 110, and modulates and transmits the signal transmitted from the control unit 110. Has the function of

  In addition to the functions of a general mobile phone, the control unit 110 determines the key being pressed based on the set of the coordinate value of the contact position sent from the touch pad 102 and the value representing the capacitance. It functions as an OS (Operating System) that notifies an event including identification information to the application execution unit 120, and includes a calculation unit 111, a switching unit 112, a key determination unit 113, an event notification unit 114, an audio processing unit 115, and a display. A control unit 116 is included.

Here, the calculation unit 111 manages the arrangement (coordinate range) of each key on the touch pad 102, and calculates the coordinate value (x, y) and capacitance of the contact position sent from the touch pad 102. It has a function of calculating a value in the range of 0 to 1024 (hereinafter referred to as “key contact value”) for each touched key based on a set with a value to represent.
The calculation unit 111 operates by switching between two states, a non-adjustment state and an adjustment state, in accordance with an instruction from the switching unit 112. In the non-adjustment state, the calculation unit 111 operates in the coordinate range of the key for each touched key. A value that increases or decreases in the range of 0 to 1024 according to the increase or decrease of the contact area is calculated, and the value is directly used as the key contact value. In the adjustment state, the contact area in the coordinate range of the key for each touched key. The amount of change with respect to the key touch value before the unit time (25 ms in this example) of the value that increases or decreases in the range of 0 to 1024 in accordance with the increase or decrease of is within a predetermined value (hereinafter referred to as “30”). The value adjusted to is the key touch value.

That is, in the adjustment state, for each touched key, the amount of change with respect to the key touch value before the unit time of the value that increases or decreases in the range of 0 to 1024 in accordance with the increase or decrease of the contact area in the coordinate range of the key is If the value is equal to or smaller than the predetermined value, the value is left as it is. If the value is larger than the predetermined value, a value obtained by adding the predetermined value to the key touch value before unit time is set as the key touch value.
In addition, as a value which increases / decreases in the range of 0-1024 according to the increase / decrease in the contact area in the coordinate range of the key currently touched, the sum total of the value for showing the electrostatic capacitance in the coordinate range of the key is shown, for example. A value that is scale-converted to take a value in the range of 0 to 1024 can be used.

Further, how the key contact value changes according to the state of the calculation unit 111 will be described in detail later (see FIG. 5).
The switching unit 112 has a function of switching the state of the calculation unit 111 based on the state of the calculation unit 111 and the key contact value calculated by the calculation unit 111.
The switching unit 112 switches the state of the calculation unit 111 to the non-adjustment state when any of the key contact values calculated by the calculation unit 111 that is in the adjustment state exceeds the key press detection threshold. When all of the key contact values calculated by a certain calculation unit 111 are less than the release detection threshold, the state of the calculation unit 111 is switched to the adjustment state.

Here, the key press detection threshold is a threshold used for determining whether or not a key is pressed, and is assumed to be, for example, “632”, and the release detection threshold is whether or not the key is released. It is assumed that the threshold is used to determine whether or not, for example, “580”.
Note that the timing at which the switching unit 112 switches the state of the calculation unit 111 will be described in detail later (see FIG. 5).

The key determination unit 113 has a function of determining one key (hereinafter referred to as “target key”) based on the key contact value calculated by the calculation unit 111. As will be described later, the process assigned to the target key is executed.
The key determination unit 113 has a predetermined number or more keys whose key contact values calculated by the calculation unit 111 are equal to or greater than a multiple press detection threshold (for example, “580”) (hereinafter “multiple press”). In principle, the key with the maximum value not less than the key press detection threshold (632) is in principle, unless there is a key less than the release detection threshold (580) at a position between each key that is not less than the multiple press detection threshold. As the target key.

  Except in the case of multiple pressing and when there is a key below the release detection threshold (580) at a position between each key that is above the multiple pressing detection threshold, when these are detected, the user's finger, etc. Since it is considered that the touch pad 102 is touched for a reason other than the normal operation by, the target key is determined by such a so-called abnormal touch, and the process assigned to the target key is erroneously performed. This is because it is necessary to prevent (hereinafter, also referred to as “corresponding processing”) from being executed. The abnormal contact includes, for example, a case where a user's face or the like touches the touch pad 102 during a call, or a case where another object such as the back contacts the touch pad 102 in the back or the like. It is done.

  In addition, as the above-mentioned predetermined number for determining that multiple pressing is performed, it is necessary to set the number of keys that cannot be touched simultaneously when the user operates a key with a finger or the like. In the following description, As an example, when a user operates a key with one finger, one finger simultaneously controls the target key, next to the target key, above or below the target key, and the target key. Assuming that it is possible to touch up to four keys diagonally, a case where there are five or more keys whose key contact value is equal to or greater than the multiple press detection threshold is determined as multiple press. In addition, once the target key is determined, the key determination unit 113 determines the next target key until the key contact values calculated by the calculation unit 111 for all the keys are equal to or less than the release detection threshold. Make it not exist.

The event notification unit 114 has a function of notifying the application execution unit 120 of an event including identification information indicating the target key determined by the key determination unit 113.
The audio processing unit 115 performs D / A (Digital / Analog) conversion on the audio signal received via the communication unit 103 and outputs the audio signal input from the speaker 105 and the A / D (Analog) / Digital) and a function of transmitting the generated signal via the communication unit 103. The above audio signal includes a DTMF (Dial Tone Multi Frequency) tone.

The display control unit 116 has a function of displaying an image or the like on the sub LCD 101 in accordance with an instruction from the application execution unit 120.
The application execution unit 120 functions as an event-driven application that performs processing according to an event notified from the control unit 110.
<Key contact value>
How the key contact value for the key touched by the user's finger or the like changes according to the state of the calculation unit 111 will be described with reference to FIG.

FIG. 5 is a diagram for explaining a change in the key contact value calculated by the calculation unit 111.
As shown in the figure, the horizontal axis indicates the time, and the vertical axis indicates the key contact value for one key touched by the user's finger or the like, but the key contact value ranges from 0 to 511. The illustration is omitted for. The GND represents a threshold value (for example, “512”) used for determining whether or not the user's finger or the like is in contact with the key.

In the following description, it is assumed that the time from time T1 to time T2 and the time from time T5 to time T7 shown in the figure is 100 ms, and that the calculation unit 111 is in the adjusted state at time T1. And
Time T1 indicates the timing at which contact with a certain key is started by the user's finger or the like.

  When the contact with the key is started, the value that increases or decreases in accordance with the increase or decrease of the contact area for the key becomes a value that exceeds the key press detection threshold. At T2, a value adjusted so that a change in value within a unit time (25 ms in this example) is within a predetermined value (“30” in this example) is calculated as a key contact value. Therefore, the key contact value increases stepwise from time T1 to time T2.

Time T2 indicates the timing at which the key contact value is equal to or greater than the key press detection threshold.
When the key contact value is greater than or equal to the key press detection threshold, the switching unit 112 switches the calculation unit 111 to the non-adjusted state at time T2, so that the switching unit 112 switches the calculation unit 111 to the non-adjusted state. Let As a result, the key contact value is no longer the adjusted value, so that the key contact value increases at a stroke from time T2 to T3. Thereafter, until time T5, the key contact value increases or decreases the contact area for the key. Will change accordingly.

Time T4 indicates the timing at which contact with a certain key by a user's finger or the like started at time T1 was released.
Since the calculation unit 111 is in an unadjusted state, the key contact value decreases at a stroke from time T4 to time T5.
Time T5 indicates the timing when the key contact value becomes equal to or less than the release detection threshold.

  When the key contact value becomes equal to or smaller than the release detection threshold, the switching unit 112 switches the calculation unit 111 to the adjustment state at time T5, so that the switching unit 112 switches the calculation unit 111 to the adjustment state. As a result, the key touch value becomes a value adjusted so that the change in the value within the unit time (25 ms) is within the predetermined value (30). Therefore, the key touch value is stepped from time T5 to time T6. Decrease.

By switching the state of the calculation unit 111 as described above, the mobile phone 100 reduces the possibility that a process assigned to an unintended key is erroneously executed (malfunction), while the key of the user is continuously changed. The responsiveness of processing to operations can be improved.
Hereinafter, the effect of switching the state of the calculation unit 111 will be described in more detail.
As described above, the key contact value is calculated by the calculation unit 111 based on the value for expressing the capacitance output from the touch pad 102. It also fluctuates due to the influence of noise caused by photographing with a camera provided in a general mobile phone.

Further, as described above, the key determination unit 113 determines a key equal to or higher than the key press detection threshold (632) as a target key, and the process assigned to the target key is executed. If the key touch value exceeds the key press detection threshold at a stroke due to the influence of noise, a malfunction occurs.
However, since the calculation unit 111 operates in the adjustment state from the time T1 when the touch to the key is started to the time T2 when the key touch value reaches the key press detection threshold value, it increases or decreases according to the increase or decrease of the touch area on the key. Since the value adjusted so that the change in the unit value within the unit time is within the predetermined value (30) is the key touch value, the key touch value exceeds the key press detection threshold at once due to the influence of noise. It cannot occur, and the occurrence of the malfunction as described above can be prevented appropriately.

  In addition, as described above, once the target key is determined, the key determination unit 113 determines the next target key until all the keys are released and the key contact value becomes equal to or less than the release detection threshold. However, since the calculation unit 111 operates in an unadjusted state from time T2 to time T5, when the user's finger or the like is released from the key at time T4, the key contact value is reduced at a stroke, Then, it coincides with the release detection threshold at time T5.

For example, if only the key related to the key contact value shown in the figure is touched by the user's finger or the like, the next target key can be determined at a time after time T5. Therefore, at time T2 to time T5, it is possible to improve the responsiveness of the process to the continuous operation of the key by the user as compared with the case where the calculation unit 111 operates in the adjustment state.
<Operation>
Next, the operation of the mobile phone 100 having the above configuration will be described with reference to FIG.

FIG. 6 is a flowchart showing a control process of the mobile phone 100 in response to an input from the touch pad 102.
As a process independent of the control process shown in the figure, the coordinate value (x, y) and the capacitance of the contact position detected from the touch pad 102 every unit time (in this example, every 25 ms). And a key contact value for each touched key is calculated by the calculation unit 111 of the control unit 110 for each unit time. At the time when the following description is started, the calculation unit 111 will be described as operating in an adjusted state.

Further, the control processing shown in FIG.
As shown in the figure, the key determination unit 113 of the control unit 110 repeats how many keys are equal to or greater than the multiple press detection threshold based on the latest key contact values calculated by the calculation unit 111 ( In this example, every 100 ms) is determined (step S1).
In step S1, when the number of corresponding keys is 0 (step S1: 0), the key determination unit 113 ends the control process without performing any particular process.

In step S1, when the number of corresponding keys is 5 or more (step S1: 5 or more), the switching unit 112 switches the state of the calculation unit 111 to the non-adjusted state (step S2). ), The process proceeds to step S11 described later.
In step S2, the state of the calculation unit 111 is switched to the non-adjustment state when the multiple press is detected when the state of the calculation unit 111 is the adjustment state. This is because after the contact is released, the key contact values of all the keys become less than the key press detection threshold value so that the next target key can be determined as soon as possible.

Further, the process proceeds to step S11 because, when multiple pressing occurs, it is considered that the touch on the touch pad 102 is not due to a normal operation with the user's finger or the like, and therefore the corresponding process is executed (malfunction). ) Is necessary to prevent.
When the number of corresponding keys is 1 to 4 in step S1 (step S1: 1 or more and less than 5), the key determination unit 113 combines the two keys included in the corresponding key. For each, it is determined whether or not the key at the position between the two keys related to the combination, that is, the key contact value of the key adjacent to each of the two keys is equal to or less than the release detection threshold (step S3). If the user's finger or the like is operated on the touch pad 102, it is normal that the user's finger or the like is in contact with one key adjacent to each of the two keys that are equal to or greater than the multiple press detection threshold value. it is conceivable that. Therefore, when one adjacent key is less than or equal to the release detection threshold, it is considered that it is not a normal operation with the user's finger or the like, and therefore it is necessary to prevent the corresponding process from being executed (malfunction). Because there is.

  When the key contact values for two keys that are not arranged in the same row and in the same column are equal to or greater than the multiple press detection threshold, for example, the key determination unit 113 multiplexes the key contact values for the 1 key and 8 keys. If the threshold value is equal to or greater than the pressing detection threshold, the keys are arranged in the row between the 1 key and the 8 key, and are arranged from the 1 key column to the 8 key column (in this example, The above determination is made assuming that the 4 key and the 5 key are adjacent to the 1 key and the 8 key.

  For example, when the key contact value for the 1 key, 3 key, 4 key, and 6 key is equal to or greater than the multiple press detection threshold, the key determination unit 113 sets the 2 key and 5 key. If any key contact value is less than or equal to the release detection threshold, an affirmative determination is made (step S3: YES), and if any of the 2 and 5 key touch values is greater than the release detection threshold, the determination is negative. Determination (step S3: NO) is performed.

In addition, when there is no key adjacent to two keys whose key contact value is equal to or greater than the multiple press detection threshold, for example, each key contact value for the 1 key and 2 keys is equal to or greater than the multiple press detection threshold. In this case, since there is no key adjacent to the 1 key and the 2 key, a negative determination (step S3: NO) is performed.
When the key contact value of any adjacent key is equal to or smaller than the release detection threshold value in step S3 (step S3: YES), the switching unit 112 changes the state of the calculation unit 111 from the adjusted state to the non-adjusted state. When the key contact value of any adjacent key is larger than the release detection threshold value (step S3: NO), the key determination unit 113 determines in step S1. It is determined whether or not there is a key whose key contact value is equal to or greater than the key press detection threshold among the detected keys that are equal to or greater than the multiple press detection threshold (step S4).

If there is no key that is greater than or equal to the key press detection threshold (step S4: NO), the process starts again from step S1, and if there is a key that is greater than or equal to the key press detection threshold (step S4: YES). The key determination unit 113 determines whether the target key has been determined (step S5).
If the target key has not been determined (step S5: NO), the key determination unit 113 determines the key having the maximum key contact value as the target key (step S6). In addition, when there are a plurality of keys related to the maximum key contact value, the target key is determined in accordance with the priority order set in advance for the key. In this example, the key arranged at the upper left is given priority. And For example, if the keys related to the maximum key contact value are 1 key, 2 key, and 4 key, 1 key is determined as the target key.

  Also, the key determination unit 113 determines whether the value obtained by subtracting the key contact value of the key above the target key from the key contact value of the target key is equal to or less than a predetermined value (in this example, “50”). (Step S7), if it is larger than the predetermined value (Step S7: NO), nothing is done, and the switching unit 112 switches the state of the calculation unit 111 from the adjusted state to the non-adjusted state (Step S9), and the process starts again from Step S1.

  When the value obtained by subtracting the key contact value of the key above the target key from the key contact value of the target key is equal to or less than the predetermined value (step S7: YES), the key determination unit 113 determines the target until then. The target key is changed from the key (the key with the maximum key contact value) to the key above the key (step S8), and the switching unit 112 changes the state of the calculation unit 111 from the adjusted state to the non-adjusted state. The process is switched (step S9), and the process starts again from step S1.

  In the process of step S8, when the user tries to operate a certain key, the belly of the finger touches the key below it, and the key contact value of this lower key becomes the maximum value. It is a process for responding to. That is, when the difference between the key contact value of the key having the maximum key contact value and the key contact value of the key above the key is equal to or less than a predetermined value (50 in this example), the user intends The target key is the upper key, and the target key is changed to the upper key.

On the other hand, when the target key has been determined in step S5 (step S5: YES), the event notification unit 114 notifies the application execution unit 120 of a key press event, and the application execution unit 120 Based on the event, a process (corresponding process) assigned to the target key is executed (step S10).
Here, the key press event is an event indicating that the key is pressed, and includes identification information of the target key as the pressed key.

  The application execution unit 120 instructs the display control unit 116 of the control unit 110 to display the number of the target key indicated by the identification information included in the key press event on the sub LCD 101 as a corresponding process, and receives this instruction. The display control unit 116 causes the sub LCD 101 to display the number of the target key. The number or the like of the target key is a number or a symbol assigned to the target key. For example, if the target key is 1 key, it is “1”, and if it is * key, it is “*”. .

Subsequently, the key determination unit 113 determines how many keys are equal to or greater than the release detection threshold based on the latest key contact values calculated by the calculation unit 111 (step S11).
When the number of corresponding keys is 1 or more (step S11: 1 or more), the determination of step S11 is repeated (in this example, every 100 ms). When the number of corresponding keys is 0 (Step S11: 0), the key determination unit 113 cancels the determination of the target key (Step S12), and the switching unit 112 switches the state of the calculation unit 111 from the non-adjusted state to the adjusted state (Step S13). ), The control process is terminated.

<Description of operation by specific example>
The operation of the mobile phone 100 described above will be described using a specific example.
<Multi-press before target key decision>
An operation example of the mobile phone 100 when multiple pressing occurs before the target key is determined will be described.
FIGS. 7A to 7E are diagrams showing examples of changes in the key contact values of the 4 key, 5 key, 1 key, 2 key, and 7 key, respectively.

In the following, at time T10, contact of the 4 key, 5 key, and 1 key is started, at time T11, contact of 2 key and 7 key is started, contact of 4 key is released at time T14, and time T15 An example will be described in which the touch of the 5 key, the 1 key, and the 7 key is released, and the contact of the 2 key is released at time T16.
Note that the time from time T10 to time T12, the time from time T12 to time T13, the time from time T13 to time T15, and the time from time T15 to time T17 are each 100 ms.

  In addition, “512” shown on each vertical axis in the figure indicates GND, “580” indicates a release detection threshold and multiple press detection threshold, and “632” indicates a key press detection threshold. The range is not shown, and the time indicated by the same reference sign in each horizontal axis indicates the same time, and these points are the same in the description of FIGS. 8 and 9 described later. .

At time T10 in FIG. 7, the key determination unit 113 starts control processing. At this time, the number of keys that are equal to or greater than the multiple press detection threshold value (580) is 0 (step S1: 0 in FIG. 6). Nothing is done and the control process is terminated.
At time T12 in FIG. 7, the key determination unit 113 starts the control process again, and performs the determination in step S1 in FIG. 6. In this example, the key (4 keys, 5 Since the number of keys (1 key, 2 keys, and 7 keys) is 5 (step S1: 5 or more), the switching unit 112 switches the state of the calculation unit 111 from the adjusted state to the non-adjusted state. (Step S2).

At time T13 in FIG. 7, the key determination unit 113 determines how many keys are equal to or greater than the release detection threshold based on the latest key contact values calculated by the calculation unit 111 (step in FIG. 6). S11) Since the number of corresponding keys (4 keys, 5 keys, 1 key, 2 keys, and 7 keys) is 5 (step S11: 1 or more), the process returns to step S11 again.
Also at time T15 in FIG. 7, the number of keys (5 keys, 1 key, 2 keys, and 7 keys) that are equal to or greater than the release detection threshold is four (step S11: 1 or more in FIG. 6). Return to processing.

At time T17 in FIG. 7, since the number of keys equal to or greater than the release detection threshold is 0 (step S11: 0), the key determination unit 113 cancels the determination of the target key (step S12), and the switching unit 112 The state of the calculation unit 111 is switched from the non-adjusted state to the adjusted state (step S13), and the control process is terminated.
As described above, the mobile phone 100 determines a key (in this example, two keys) whose key contact value is greater than or equal to the multiple press detection threshold but less than the key press detection threshold before the target key is determined (time T12 in this example). And 7 keys) can be detected. Therefore, for example, even when the user's ear or face touches the touch pad 102 during a call, the key contact value is the maximum value among the keys whose key contact value is equal to or greater than the multiple press detection threshold. It is possible to appropriately prevent the malfunction that the key is determined as the target key and the corresponding process is erroneously executed.

<Multi-press after target key decision>
An operation example of the mobile phone 100 when multiple pressing occurs after the target key is determined will be described.
FIGS. 8A to 8E are diagrams showing examples of changes in key contact values of the 4 key, 5 key, 1 key, 7 key, and 8 key, respectively.
In the following, at time T20, 4 key and 5 key contact is started, at time T21, 1 key contact is started, at time T22, 7 key and 8 key contact is started, and at time T25, 4 key is started. A case will be described as an example in which the touches of the keys 7 and 7 are released and the touches of the keys 5, 1 and 8 are released at time T26.

Note that the time from time T20 to time T23, the time from time T23 to time T24, the time from time T24 to time T26, and the time from time T26 to time T27 are each 100 ms.
At time T20 in FIG. 8, the key determination unit 113 starts control processing. At this time, the number of keys that are equal to or greater than the multiple press detection threshold (580) is 0 (step S1: 0 in FIG. 6). Nothing is done and the control process is terminated.

  At time T23 in FIG. 8, the key determination unit 113 starts the control process again, and performs the determination in step S1 in FIG. 6. In this example, the key (4 keys, 5 The number of keys and 1 key) is 3 (step S1: 1 or more and less than 5). In this example, the key adjacent to the 1 key and the 4 key, the key adjacent to the 1 key and the 5 key, 4 Since there is no key adjacent to the key and the 5th key, it is determined that the key contact value of the adjacent key is not less than or equal to the release detection threshold (step S3: NO).

  In addition, among the keys that are greater than or equal to the multiple press detection threshold detected in step S1, there are keys (4 keys and 5 keys) whose key contact value is greater than or equal to the key press detection threshold (step S4: YES), and the target The key has not been determined (step S5: NO), and in this example, the key contact values of the 4 key and the 5 key are both 632, which is the maximum value. According to the ranking, the four keys arranged on the left side are determined as the target keys (step S6).

  Further, the value (24) obtained by subtracting the key contact value (608) of the key (1 key) above the target key from the key contact value (632) of the target key (4 keys) is equal to or less than the predetermined value (50). (Step S7: YES), the key determination unit 113 changes the target key from the previous target key (4 keys) to the key (1 key) above that key (Step S8), and the switching unit 112 The state of the calculation unit 111 is switched from the adjusted state to the non-adjusted state (step S9), and the process is started again from step S1.

At time T24 in FIG. 8, the key determination unit 113 performs the determination in step S1 in FIG. 6. In this example, the key (4 key, 5 key, 1 key, 7 key) that is equal to or greater than the multiple press detection threshold (580). , And 8 keys) is five (step S1: 5 or more), the switching unit 112 switches the state of the calculation unit 111 to the non-adjusted state (step S2).
At time T26 in FIG. 8, the key determination unit 113 determines how many keys are equal to or greater than the release detection threshold based on the latest key contact values calculated by the calculation unit 111 (step in FIG. 6). S11) Since the number of corresponding keys (5 keys, 1 key, and 8 keys) is three (step S11: 1 or more), the process returns to step S11 again.

Since the number of keys equal to or greater than the release detection threshold is 0 at time T27 in FIG. 8 (step S11: 0 in FIG. 6), the key determination unit 113 cancels the determination of the target key (1 key in this example) ( In step S12), the switching unit 112 switches the state of the calculation unit 111 from the non-adjusted state to the adjusted state (step S13), and ends the control process.
As described above, the cellular phone 100 determines the target key after determining the target key even when multiple keys are not detected at the timing when a key whose key contact value first exceeds the multiple key detection threshold (time T23 in this example) is detected. In the example, it is determined again whether or not multiple pressing is performed at time T24). Therefore, if multiple pressing is detected at this timing, malfunction can be prevented appropriately.

<When inserting a key below the release detection threshold>
An operation example of the mobile phone 100 when the key contact value of a key adjacent to each key whose key contact value is equal to or greater than the multiple press detection threshold is equal to or less than the release detection threshold will be described.
FIGS. 9A and 9B are diagrams showing examples of changes in the key contact values of the 5 key and the 0 key, respectively.

In the following, at time T30, 5 key contact is started, at time T31 0 key contact is started, at time T34, 5 key and 0 key contact is released, and 2 key and 8 key contact. An example will be described in which the value is equal to or less than the release detection threshold at time T30 to time T36.
Note that the time from time T30 to time T32, the time from time T32 to time T33, the time from time T33 to time T35, and the time from time T35 to time T36 are each 100 ms.

At time T30 in FIG. 9, the key determination unit 113 starts control processing. At this time, the number of keys that are equal to or greater than the multiple press detection threshold value (580) is 0 (step S1: 0 in FIG. 6). Nothing is done and the control process is terminated.
At time T32 in FIG. 9, the key determination unit 113 starts the control process again, and performs the determination in step S1 in FIG. 6. In this example, the key determination unit 113 determines the key (5 keys) that is equal to or greater than the multiple press detection threshold (580). The number is one (step S1: from 1 to less than 5). In this example, there is no adjacent key, so it is determined that the key contact value of the adjacent key is not less than the release detection threshold (step S3: NO). ).

In addition, among the keys that are greater than or equal to the multiple press detection threshold detected in step S1, there are keys (5 keys) whose key contact value is greater than or equal to the key press detection threshold (step S4: YES), and the target key is determined. However, the key determination unit 113 determines 5 keys as target keys (step S6).
Further, the value obtained by subtracting the key contact value of the key (2 key) above the target key from the key contact value (632) of the target key (5 key) is larger than the default value (50) (step S7: NO). ), The switching unit 112 switches the state of the calculation unit 111 from the adjusted state to the non-adjusted state (step S9), and starts the process again from step S1.

  At time T33 in FIG. 9, the key determination unit 113 performs the determination in step S1 in FIG. 6. In this example, the number of keys (5 key and 0 key) that are equal to or greater than the multiple press detection threshold value (580) is two. Since the key contact value of the 8 keys adjacent to the 5 key and the 0 key is equal to or smaller than the release detection threshold (step S3: YES), the switching unit 112 is in the state of the calculation unit 111. Are switched from the adjusted state to the non-adjusted state (step S2).

  At time T35 in FIG. 9, the key determination unit 113 determines how many keys are equal to or greater than the release detection threshold based on the latest key contact values calculated by the calculation unit 111 (step in FIG. 6). S11) Since the number of corresponding keys is 0 (step S11: 0), the key determination unit 113 cancels the determination of the target key (5 keys in this example) (step S12, the switching unit 112 calculates the calculation unit 111). Is switched from the non-adjusted state to the adjusted state (step S13), and the control process is terminated.

  As described above, the mobile phone 100 allows the user to use his / her finger or the like even if the number of keys whose key contact value is equal to or greater than the multiple press detection threshold is less than the number determined to be multiple press (5 or more in this example). How to touch the key that cannot be assumed when operating the key, that is, the key contact value of the key adjacent to each of the two keys whose key contact value is equal to or greater than the multiple press detection threshold is less than or equal to the release detection threshold Such a key contact method can be detected to prevent malfunction.

  In the above, at T33, the key determination unit 113 releases the key contact values of the keys (8 keys) adjacent to the two keys (5 key and 0 key) each having a key contact value equal to or greater than the multiple press detection threshold. Although an example of detecting that the value is equal to or smaller than the detection threshold has been described, if the touch to the 0 key is started before time T31 in FIG. 9, the key touch value of the 0 key is the multiple press detection threshold at time T32. If it is (580) or more, at time T32, it is detected that the key contact value of the 8 keys is equal to or less than the release detection threshold value, and similarly malfunction can be prevented.

≪Modification≫
The following is different from the method described in step S3 of FIG. 6 for detecting that the key contact value of each key adjacent to two keys whose key contact values are equal to or greater than the multiple press detection threshold is equal to or less than the release detection threshold. An example will be described in which contact with the touch pad 102 other than the normal operation by the user's finger or the like is detected as a method to prevent malfunction.

The mobile phone according to the modified example (hereinafter also referred to as “modified mobile phone”) is obtained by slightly changing the function of the key determining unit 113 of the mobile phone 100 according to the first embodiment. Therefore, here, the description will focus on the changed portion.
<Operation>
The operation of the modified mobile phone will be described with reference to FIG.

FIG. 10 is a flowchart showing a control process of the modified mobile phone in response to an input from the touch pad 102.
As shown in the figure, the control process of the modified mobile phone does not include the process of step S3 in the control process of mobile phone 100 according to the first embodiment shown in FIG. 6, but adds the processes of steps S14 and S15. In this respect, the control process is different from the control process of the mobile phone 100. Therefore, these differences will be mainly described.

  The key determination unit of the modified mobile phone (hereinafter also referred to as “transform key determination unit”) has a number of keys that are equal to or greater than the multiple press detection threshold based on the latest key contact values calculated by the calculation unit 111. (Step S1), and particularly when the number of corresponding keys is 1 to 4 (step S1: 1 or more and less than 5), it is equal to or greater than the multiple press detection threshold detected in step S1. It is determined whether or not there is a key whose key contact value is greater than or equal to the key press detection threshold (step S4).

If there is a key that is equal to or greater than the key press detection threshold (step S4: YES), the transformation key determination unit determines whether the target key has been determined (step S5), and the target key has not been determined. (Step S5: NO), the deformation key determination unit determines the key having the maximum key contact value as the target key (step S6).
The transformation key determination unit determines whether the key touch value of each key (hereinafter referred to as “specific key”) excluding the key adjacent to the target key and the key two keys below the target key is equal to or greater than the multiple press detection threshold value. Is determined (step S14). For example, when the target key is 5 keys, keys other than 1 key to 4 keys, 6 keys to 9 keys, and 0 key are specific keys. When the target key is 4 keys, keys other than 1 key, 2 keys, 5 keys, 7 keys, 8 keys, and * key are specific keys.

  When the key contact value of the specific key is equal to or greater than the multiple press detection threshold (step S14: YES), the deformation key determination unit proceeds to the process of step S11. This is based on the premise that when a user operates a key with a finger or the like, up to four keys can be touched at the same time, when the user operates the key with a finger or the like, the target key and a specific key are touched. This is because there is nothing to do. In addition, the key that is two keys below the target key is not included in the specific key because, for example, when the user operates the key with a finger or the like, the key belly touches the key two keys below the target key. This is because there is a possibility that it will end up.

  When the key contact value of the specific key is less than the multiple press detection threshold (step S14: NO), the deformation key determination unit determines the target key from the key contact value of the target key, as described with reference to FIG. It is determined whether or not the value obtained by subtracting the key contact value of the key above is equal to or less than the predetermined value (50) (step S7), and the process of step S8 is executed according to the determination result, and the switching unit 112 is determined. Executes the switching process in step S9 and starts the process again from step S1.

Similarly to the above, when the processes of steps S1, S4, and S5 are performed and the target key has been determined (step S5: YES), the transformation key determination unit determines the key of the specific key as in step S14 described above. It is determined whether or not the contact value is greater than or equal to the multiple press detection threshold (step S15).
In step S15, whether or not the key contact value of the specific key is equal to or greater than the multiple press detection threshold may be determined when the start of contact with the specific key is delayed from the start of contact with the target key. Because there is.

  If the key contact value of the specific key is greater than or equal to the multiple press detection threshold value (step S15: YES), nothing is done and the process proceeds to step S11, where the key contact value of the specific key is less than the multiple press detection threshold value. In this case (step S15: NO), as described in the first embodiment, the application execution unit 120 executes the corresponding process based on the key press event from the event notification unit 114 (step S10).

Based on the latest key contact values calculated by the calculation unit 111, the deformation key determination unit determines how many keys are equal to or greater than the release detection threshold (step S11), and the number of corresponding keys is 0. If it is (step S11: 0), the determination of the target key is canceled (step S12), the switching unit 112 performs a switching process (step S13), and ends the control process.
<< Embodiment 2 >>
In a general mobile phone, when a key operation is performed during a call, a DTMF tone is transmitted to the callee as a process corresponding to the operated key.

The transmission of the DTMF tone during a call may be a serious problem depending on the destination. For example, if the user's face touches the touch pad 102 when using telephone banking or the like of a financial institution and the DTMF tone of the touched key is transmitted, a transaction unintended by the user is made. There is a risk.
Here, when the user's face or the like touches the touch pad 102 during a call, the contact generally continues for a long time as compared with a normal operation performed by the user with a finger or the like.

Therefore, in the second embodiment, the cellular phone 100 according to the first embodiment is added with a function for detecting that a contact has been made for a certain period of time during a call and not outputting a DTMF tone. Will be described focusing on the differences from the mobile phone 100.
<Configuration>
FIG. 11 is a block diagram showing a functional configuration of a main part of mobile phone 200 according to Embodiment 2. In FIG.

As shown in the figure, the mobile phone 200 includes a control unit 210 and an application execution unit 220 instead of the control unit 110 and the application execution unit 120 of the mobile phone 100 according to the first embodiment, and in addition, a timer unit. 201 and a storage unit 202.
Here, the timer unit 201 is realized by a timer or a counter, and has a function of starting timing in accordance with an instruction from the control unit 210 and notifying the control unit 210 when a long press time (for example, 1 second) has elapsed. .

Here, the long press time is used when determining whether the touch to the key is due to the normal operation of the user or the touch of the touch pad 102 with the face or the like. It is assumed that the long press time is set in advance by the manufacturer of the mobile phone 200 or the like.
The storage unit 202 is a memory area for storing a basic screen and display state information.

Here, the basic screen is image data to be displayed on the sub LCD 101 during, for example, a call or a call. The display state information is information indicating the state of the screen displayed on the sub-LCD 101, and is configured so that it can be identified how the screen is generated.
In addition, the control unit 210 replaces the key determination unit 113, the event notification unit 114, and the display control unit 116 of the control unit 110 according to Embodiment 1 with a key determination unit 212, an event notification unit 213, and a display control unit. 214, and in addition, a call detecting unit 211 is included.

  Here, the call detection unit 211 has a function of detecting that the mobile phone 200 is in a call based on communication contents transmitted and received with the base station via the communication unit 103 and a user operation. . Specifically, when an off-hook operation is performed when a call signal (ringer) is received, it is determined that the call has started, and when the on-hook operation is performed after the call is started, the call ends. It is determined that the call has been made, and it is detected that the call is in progress from the start of the call until the end of the call.

In addition to the function of the key determination unit 113 according to the first embodiment, the key determination unit 212 has a function of starting the time measurement of the time measurement unit 201 when detecting a key whose key contact value is equal to or greater than the key press detection threshold. Have.
The event notification unit 213 receives the temporary key press event in addition to the key press event notified by the event notification unit 114 according to the first embodiment in accordance with the presence / absence of the notification from the time measuring unit 201 and the presence / absence of the detection by the call detection unit 211. And a cancel event. The temporary key press event and the cancel event will be described later.

Note that the event notification unit 213 includes information indicating the presence or absence of detection by the call detection unit 211 in the key press event. This is because even when the same key is touched, the corresponding processing of the key may differ depending on whether or not a call is in progress.
For example, in the following, the corresponding process when the 1 key is touched when the call is not in progress is only “1” displayed on the sub LCD 101, but the corresponding process when the 1 key is touched during the call , It is assumed that “1” is displayed on the sub LCD 101, a DTMF tone corresponding to one key is transmitted to the call destination, and a DTMF tone corresponding to one key is output from the speaker 104.

The display control unit 214 has a function of updating the display state information in the storage unit 202 in addition to the function of the display control unit 116 according to the first embodiment.
Similar to the application execution unit 120 according to the first embodiment, the application execution unit 220 functions as an event-driven application that performs processing according to an event notified from the control unit 210. Since the event notification unit 213 also notifies a temporary key press event and a cancel event, it differs from the application execution unit 120 in that processing corresponding to these events is performed.

<Operation>
The operation of the mobile phone 200 will be described with reference to FIG.
FIG. 12 is a flowchart showing a control process of the mobile phone 200 for an input from the touch pad 102.
As shown in the figure, the key determination unit 212 of the control unit 210 determines how many keys are equal to or greater than the multiple press detection threshold (step S21), similarly to steps S1 to S5 of FIG. Determining whether or not the key contact value of the key adjacent to the two keys related to each combination is less than or equal to the release detection threshold (step S23), and determining whether or not there is a key greater than or equal to the key press detection threshold ( In step S24), it is determined whether or not the target key has been determined (step S25).

  When the target key has not been determined (step S25: NO), the key determination unit 212 determines the target key (step S26), the target key and the target key as in steps S6 to S8 of FIG. It is determined whether or not the difference between the key contact value and the key is equal to or less than a predetermined value (50) (step S27), and only when the difference is equal to or less than the predetermined value (50) (step S27: YES) Change (step S28).

Subsequently, the key determination unit 212 causes the time measuring unit 201 to start measuring time (step S29), and performs the switching process (step S30) of the state of the calculation unit 111 by the switching unit 112, similarly to step S9 of FIG. The process starts again from step S21.
Similarly to the above, the processes of steps S21 to S25 are performed. If the target key has been determined in step S25 (step S25: YES), the corresponding process of the target key described later is performed (step S31), and the key determination unit As in steps S11 to S13 in FIG. 6, 212 determines how many keys are equal to or greater than the release detection threshold based on the latest key contact values calculated by the calculation unit 111 (step S32). ), When the number of keys equal to or greater than the release detection threshold is 0 (step S32: 0), the determination of the target key is canceled (step S33),
The switching process of the state of the calculation part 111 by the switching part 112 (step S34) is performed, and the control process is terminated.

Next, the target key correspondence processing in step S31 described above will be described with reference to FIG.
FIG. 13 is a flowchart showing the target key handling process of the mobile phone 200.
Hereinafter, a case where the target key indicated by the identification information included in each event is one key will be described as an example.

The event notification unit 213 determines whether or not a call is in progress, that is, whether or not the call detection unit 211 detects that a call is in progress (step S40). NO), and notifies the application execution unit 220 of a key press event including the identification information of the target key and information indicating that the call is not in progress (step S46).
Based on the key press event, the application execution unit 220 executes a corresponding process for the target key when the call is not in progress. That is, in this example, the application execution unit 220 calculates the number of the target key (1 key) indicated by the identification information included in the key press event based on the information indicating that the call is not included in the key press event. The display control unit 214 is instructed to display on the sub LCD 101, and the display control unit 214 that receives the instruction causes the sub LCD 101 to display the number of the target key and the like (in this example, “1”).

On the other hand, when the call is in progress (step S40: YES), the display control unit 214 updates the display state information in the storage unit 202 to indicate the current screen state, and the event notification unit 213 receives the temporary key. A push event is notified to the application execution unit 220 (step S41).
Here, for example, since the current screen is a call screen, the display state information is updated to show this call screen. In the following, it is indicated that the current screen is a call screen, “SET IMAGE = call It will be expressed as “screen”.

Further, the temporary key press event is an event indicating that the key press has started, and includes identification information of the target key as the key whose press has been started.
When the temporary key press event is notified, the application execution unit 220 is a process related to the display on the sub LCD 101 in the corresponding process when the target key indicated by the identification information included in the temporary key press event is in a call. I do. That is, a process of instructing the display control unit 214 of the control unit 210 to display the number of the target key or the like (“1” in this example) on the sub LCD 101 is performed.

  Upon receiving this instruction, the display control unit 214 causes the sub LCD 101 to display the number of the target key or the like (“1” in this example), and shows the screen after displaying the number of the target key or the like. Update the display status information. In the following, it is assumed that “1” is displayed as “DRAW (“ 1 ”)”. In this example, the display state information is “DRAW ( “1”) ”is recorded.

  Subsequently, the key determination unit 212 repeatedly determines whether or not the key contact value of the target key is equal to or less than the release detection threshold (in this example, every 100 ms) (step S42), and the key contact value of the target key is released. If it is larger than the detection threshold (step S42: NO), it is determined whether or not the long press time has elapsed (step S43). Specifically, the key determination unit 212 makes an affirmative determination (step S43: YES) when the time measuring unit 201 notifies that the long press time has elapsed.

If the long press time has not elapsed (step S43: NO), the process is performed again from step S42. If the long press time has elapsed (step S43: YES), the event notification unit 213 receives a cancel event. Is notified to the application execution unit 220 (step S44), and the corresponding process for the target key is terminated.
Here, the cancel event is an event indicating that a long press time has elapsed since the start of the key press, and includes the identification information of the target key as the key.

When notified of the cancel event, the application execution unit 220 performs a process of instructing the display control unit 214 to undo the process related to the display based on the temporary key press event notified in step S41.
Upon receiving this instruction, the display control unit 214 causes the sub-LCD 101 to display a screen before executing processing related to display based on the temporary key press event notified in step S41 based on the display state information in the storage unit 202. The display state information is updated to indicate the state of the screen.

For example, in the above-described example, since the display state information is a state in which “DRAW (“ 1 ”)” is recorded after “SET IMAGE = call screen”, the call screen is based on “SET IMAGE = call screen”. Is displayed, and “DRAW (“ 1 ”)” is deleted from the display state information.
On the other hand, when the key contact value of the target key is equal to or smaller than the release detection threshold in step S42 (step S42: YES), the event notification unit 213 notifies the application execution unit 220 of a cancel event (step S45). A key press event including information indicating that the call is in progress is notified (step S46).

Here, the cancellation event is notified before the key pressing event, and the processing related to the display based on the temporary key pressing event notified in step S41 in the corresponding processing during the call is undone. This is because the entire response process during the call is executed.
As a result, as in step S44 described above, the application execution unit 220 first performs display control so as to undo the processing related to the display based on the temporary key press event notified in step S41 based on the cancel event. The display control unit 214 that receives the instruction performs processing related to display based on the temporary key press event notified in step S41, based on the display state information in the storage unit 202. The previous screen is displayed on the sub LCD 101, and the display state information is updated to indicate the state of the screen.

Subsequently, the application execution unit 220 performs a process of instructing the display control unit 214 of the control unit 210 to display the number of the target key or the like (“1” in this example) on the sub LCD 101 based on the key press event. In addition, the control unit 210 is instructed to transmit a DTMF tone corresponding to the target key.
Upon receiving this instruction, the display control unit 214 updates the display status information in the storage unit 202 by causing the sub-LCD 101 to display the number of the target key (“1” in this example) as in step S41 described above. To do.

For example, in the above-mentioned example, since “SET IMAGE = call screen” is recorded in the display state information, “DRAW (“ 1 ”)” is recorded following this “SET IMAGE = call screen”. It becomes a state.
Upon receiving the instruction, the voice processing unit 115 of the control unit 210 transmits a DTMF tone corresponding to the target key (in this example, 1 key) to the other party on the call via the communication unit 103, and the target key ( In this example, a DTMF tone corresponding to 1 key) is output from the speaker 104, and the corresponding processing for the target key is terminated.

  As described above, when the cellular phone 200 is in a call and the key press is started, the display processing of the corresponding processing of the key is once executed, but the key is released. If the long press time has elapsed, the display is returned to the state before the processing related to the display is executed, and the remaining processing of the corresponding processing is not executed. Accordingly, when a long press time elapses without the key being released, the DTMF tone is not output, so that the user's face or the like touches the touch pad 102 when using telephone banking or the like of a financial institution. Therefore, it is possible to appropriately prevent a serious malfunction such as a transaction unintended by the user.

<Supplement>
As mentioned above, although the portable terminal which concerns on this invention was demonstrated based on Embodiment 1 and Embodiment 2 (henceforth only "each embodiment") including a modification, it deform | transforms as follows. Of course, the present invention is not limited to the mobile phone as shown in each of the above-described embodiments.

(1) The mobile phone according to each embodiment has been described as a side-opening type foldable mobile phone. However, if the mobile phone has a touchpad, A mobile phone having another appearance such as a straight type or a slide type may also be used.
(2) Although the mobile phone according to each embodiment has been described on the assumption that the sub LCD 101 and the touch pad 102 exist separately as shown in FIG. 3, the sub LCD 101 and the touch pad 102 are combined. A so-called touch panel may be included.

In addition, the operation part and the part for displaying the operated character and the like are not only realized by one touch panel. For example, the part for inputting numbers, characters, and the like is a touch panel, and the input character or the like is displayed. The displayed portion may be configured by an LCD, an organic EL (Organic Electro-Luminescence), or the like.
In addition, the touch panel is not limited to displaying characters or the like on an LCD that displays images or the like as a display device to be used. The touch panel is disposed on the illumination unit and the illumination unit, and has a shape of characters or designs. A combination with a sheet having a transmitted portion can also be used. In this case, the user changes the capacitance of the touchpad by pressing the position of the transmissive part in the form of a predetermined character on the sheet, for example, and inputs the predetermined character on the sheet.

  (3) Although the touch pad 102 according to each embodiment has been described as being realized by a capacitive touch sensor, as the capacitive touch sensor, a large number of electrode patterns such as plastic and glass are used. A projection type that is formed on a substrate and discriminates by measuring the ratio of the amount of current due to a plurality of electrode patterns in the vicinity of the contact point, and has a conductive film and a substrate, and electrodes are provided at the corners of the substrate. An appropriate material such as a surface type that forms a uniform electric field by the conductive film and measures the ratio of the current amount of the terminal at the corner due to contact with a finger or the like to determine the contact position can be used. Similarly, the appropriate touch panel (2) can be used.

  In the description of each embodiment, the touch pad 102 is realized by a capacitive touch sensor. However, the present invention is not limited to such a case, and the touch pad 102 is an electronic device. Depending on the electromagnetic induction method using a dedicated pen such as a pen, the matrix switch method consisting of a transparent electrode with a two-layer structure, and the voltage applied to one of the two resistive films, depending on the position operated on the other resistive film Detecting resistance voltage, detecting the rebound of vibration waves by the voltage change of the piezoelectric element, detecting the surface acoustic wave method detecting the contact of the finger, etc. It may be an infrared system that performs this, or an optical sensor system that incorporates an optical sensor into the screen to detect the contact position.

(4) In each embodiment, the description has been given assuming that GND is “512”, the release detection threshold and the multiple press detection threshold are “580”, and the key press detection threshold is “632”. It is desirable to decide as follows.
In other words, as described above, the key contact value is calculated based on a value representing the capacitance output from the touch pad 102, so that the touch pad is not touched by the user's finger or the like. It is desirable to measure in advance a value for expressing the capacitance output from 102 and determine GND based on the value.

  In addition, the value representing the capacitance output from the touch pad 102 is actually touched by the user's finger or the like due to noise on the touch pad generated by the operation of each functional unit that performs a call or camera photography. May fluctuate despite not. Accordingly, in the above-described operation such as a call or camera shooting, it is measured in advance how much the value for expressing the capacitance output from the touch pad 102 increases, and the release detection threshold is based on the value. It is desirable to determine the multiple press detection threshold.

  In addition, the key contact value of a key touched by a user's finger or the like varies, but generally, the key contact value of a key adjacent to this key that is not actually touched also varies. . Therefore, in the example of each embodiment, the difference between the release detection threshold and the multiple press detection threshold (580) and the key press detection threshold (632) is “52”. In advance, it is measured in advance how much the value for expressing the capacitance output from the touchpad 102 of the key that is not actually touched is increased. It is desirable to determine the difference and determine the release detection threshold and the multiple press detection threshold.

In each embodiment, the release detection threshold and the multiple press detection threshold are set to the same value (580). However, these values do not have to be the same value, and may be different values.
(5) In each embodiment, when operated with a user's finger or the like, the number of touched keys is five or more on the assumption that up to four keys can be touched at the same time. However, this is merely an example, and multiple presses may be determined when two or more predetermined numbers of keys are touched. Note that the number of keys that can be touched simultaneously when operated with a user's finger or the like is considered to vary somewhat depending on the size of the user's finger or the like. Therefore, for example, at the start of operation of the mobile phone according to each embodiment, when the user actually performs key operations, counts how many keys are touched at the same time, and when more keys are touched Alternatively, it may be determined that multiple pressing is performed. In addition, the number of keys that the user should determine as multiple presses may be set.

(6) In step S2 of FIG. 6 and FIG. 10 and step S22 of FIG. 12, after the contact from the touch pad 102 is released, the key contact values of all the keys become less than the key press detection threshold value. The state of the calculation unit 111 is switched to the non-adjustment state so that the target key can be determined as soon as possible.
When step S2 in FIG. 6 and FIG. 10 and step S22 in FIG. 12 are executed, in a situation where a normal operation with the user's finger or the like is being performed, such as the user's face touching the touch pad 102, or the like. This is because it is not considered. That is, in such a situation, it is considered that it is less necessary to perform processing corresponding to the next key operation as soon as possible.

Moreover, you may be made to perform only the process of step S2 of FIG.6 and FIG.10 and step S22 of FIG. 12 when the state of the calculation part 111 is an adjustment state.
(7) In step S7 in FIG. 6 and FIG. 10 and step S27 in FIG. 12, the key contact value of the target key (the key whose key contact value is the maximum value) and the key contact value of the key above the target key are calculated. Although it has been described that it is determined whether or not the difference is equal to or less than a predetermined value (50 in this example), not only the key above the target key but also the difference between the key contact value of the right and left keys of the target key You may make it determine whether it is below a predetermined value. In this case, the difference between the key contact value of the target key and the key contact value of the upper, right, and left keys of the target key is calculated, respectively, and if any of the calculated differences is equal to or less than the default value, The target key may be determined for the key having the smallest difference.

Further, the key for calculating the difference from the key contact value of the target key may be any one of the right key and the left key of the target key, and further, the difference from the key contact value of the target key is calculated. The user may be allowed to set whether the key to be used is the top, right, or left key of the target key.
(8) In step S7 of FIG. 6 and FIG. 10 and step S27 of FIG. 12, the key contact value of the target key (the key whose key contact value is the maximum value) and the key contact value of the key above the target key. In the above description, it is determined whether or not the difference between the key and the key is equal to or less than a predetermined value (50). You may make it determine. As described in the above (7), when the key for calculating the difference from the key contact value of the target key is the right key and / or the left key of the target key, the same modification is performed. Is possible.

The predetermined value larger than the above-described key press detection threshold is preferably determined based on, for example, a result of actually causing the user to perform a plurality of operations.
(9) In the second embodiment, the application execution unit 220 of the mobile phone 200 has been described as performing the process of updating the display of the sub LCD 101 based on the notified temporary key press event. At the same time, a process other than a process that has a relatively large effect when the input from the touch pad 102 is an erroneous contact may be performed. For example, (A) the number of the button touched by the user may be stored in a buffer in preparation for dialing, (B) the process of moving the cursor, or (C) the shooting process of the built-in camera. Good. In addition, in the case where the process (A) is performed, an example of the process when the cancel event is notified includes a process of discarding the number stored in the buffer, and the process (B) is performed. As an example of the process when the cancel event is notified, there is a process for returning the moved cursor, and an example of the process when the cancel event is notified when the process (C) is performed. As an example, a process of deleting a photographed image is exemplified, and an example of a process when a key press event is notified includes a process of outputting a shutter sound from the speaker 104.

  Examples of the process having a relatively large influence include a communication process other than a call that has already been performed, a voice output process from the speaker 104, a ringing process of the vibrator 106, and the like. When communication processing such as transmission of DTMF tones or automatic transmission in the three-way call function is performed during a call, a serious malfunction such as bank transaction unintended by the user or charging will occur. There is a big influence. In addition, when voice output processing such as output of the DTMF tone from the speaker 104 or ringing processing of the vibrator 106 is performed, the mobile phone user according to the present invention is relatively disturbed in that the phone call is disturbed. There is a big impact.

That is, the above-described process having a relatively large influence is a process to be executed when it is determined that there is no erroneous contact, and the process based on the key press event at the time of a call is the example described in the second embodiment. The present invention is not limited to the above-described communication processing, voice output processing from the speaker 104, ringing processing of the vibrator 106, and the like.
(10) Even if the method for detecting contact with the touch pad 102 other than the normal operation by the user's finger or the like, which is described in the modification of the first embodiment, is applied to the mobile phone 200 according to the second embodiment. good.

(11) In each embodiment, the touch pad 102 sends a set of the coordinate value (x, y) of the contact position and a value representing the capacitance to the control unit 110, and the calculation unit 111 Although it has been described that the key contact value is calculated for each touched key based on the set, it can be modified as follows.
That is, the touchpad according to this deformation (hereinafter referred to as “deformation touchpad”) outputs a value that increases or decreases in the range of 0 to 1024 according to the increase or decrease of the contact area for each key. The calculation unit (hereinafter referred to as “deformation calculation unit”) may calculate the key contact value according to its own state (non-adjusted state and adjusted state).

  More specifically, 20 ports of a capacitive touch sensor IC (Integrated Circuit) for realizing the deformed touch pad are assigned to each key on the touch pad on a one-to-one basis. The deformation calculation unit receives a value that increases or decreases in the range of 0 to 1024 in accordance with the increase or decrease of the contact area for each key via each port. The number of IC ports is not limited to 20 as described above, and can be changed as appropriate.

(12) Of all the constituent elements described in each embodiment, all or a part may be realized by an integrated circuit of one chip or a plurality of chips, may be realized by a computer program, or any other You may implement | achieve in such a form.
(13) A program for causing the CPU to execute the processing (see FIGS. 6, 10, and 12) for the input from the touch pad 102 described in each embodiment is recorded on a recording medium, or various communication paths are set. It can also be distributed and distributed. Such a recording medium includes an IC card, an optical disk, a flexible disk, a ROM, a flash memory, and the like. The distributed and distributed program is used by being stored in a memory or the like that can be read by a CPU in the device, and each function of the mobile phone described in each embodiment is executed by the CPU executing the program. Is realized.

  (14) In the embodiment of the mobile terminal according to the present invention, when contact is detected, the touch pad outputs a value indicating the degree of contact, and the value indicating the degree of contact output from the touch pad. And a calculation unit for calculating a value indicating the degree of contact in the range for each range in which contact is detected on the touchpad, and a target range for determining a target range to which a process to be executed is assigned. A range in which a value calculated by the calculation unit is greater than or equal to a second threshold value among a holding unit that holds one threshold value and a second threshold value that is smaller than the first threshold value and a range in which contact is detected on the touchpad Is less than a predetermined value, a range in which the value calculated by the calculation unit is equal to or greater than a first threshold value is determined as a target range, and the value calculated by the calculation unit is a second threshold value. The number of ranges above is already If the value or more, characterized by comprising a determination unit which does not perform the determination of target range.

  According to the embodiment of the mobile terminal according to the present invention having the above-described configuration, the target range is not determined when there is a predetermined number or more of ranges in which the value calculated by the calculation unit is equal to or greater than the second threshold. . That is, the embodiment of the portable terminal according to the present invention is not only for the case where all the values calculated by the calculation unit for each range equal to or greater than the predetermined number are equal to or greater than the first threshold used for determining the target range. Even when the value is equal to or greater than the second threshold value that is smaller than the first threshold value, it is possible to prevent the process assigned to one range in which the value calculated by the calculation unit is equal to or greater than the first threshold value from being executed. That is, the embodiment of the mobile terminal according to the present invention can reduce the occurrence of malfunction.

(15) The touch pad may perform the detection by a change in capacitance.
As a result, the touchpad according to the embodiment of the mobile terminal according to the present invention can detect the state in which the object is close, so that, for example, when the user's face touches the touchpad or the user's face touches If the pad is non-contact but approaches, if the value calculated by the calculation unit for the range of the predetermined number or more on the touch pad is greater than or equal to the second threshold, the user's face or the like is in contact, or In addition, it is possible to appropriately prevent a malfunction caused when the user's face or the like is not in contact with the touchpad but approaches.

(16) Further, the determination unit may determine, as the target range, a range in which the value calculated by the calculation unit is a maximum value among the ranges that are equal to or greater than the first threshold.
Thereby, embodiment of the portable terminal which concerns on this invention determines the range whose value calculated by the calculation part is the largest value more than a 1st threshold value as an object range. It is assumed that the degree of contact with respect to the range in which the user has tried to touch the finger or the like is the highest, that is, the value calculated by the calculation unit for this range is assumed to be the maximum.

Therefore, under this assumption, the embodiment of the mobile terminal according to the present invention can execute processing assigned to the range intended by the user.
(17) The touchpad according to the present invention corresponds to the touchpad 102 according to each embodiment, and the calculation unit according to the present invention corresponds to the calculation unit 111 according to each embodiment, and the holding according to the present invention. The unit and the determination unit correspond to the key determination unit according to each embodiment.

  The portable terminal according to the present invention is used when a user performs an operation using a touch pad.

1, 2 Case 3 Input key 4 LCD
100, 200 Mobile phone 101 Sub LCD
DESCRIPTION OF SYMBOLS 102 Touchpad 103 Communication part 104 Speaker 105 Microphone 106 Vibrator 110, 210 Control part 111 Calculation part 112 Switching part 113, 212 Key determination part 114, 213 Event notification part 115 Voice processing part 116, 214 Display control part 120, 220 Application execution Unit 201 Timekeeping unit 202 Storage unit 211 Call detection unit

Claims (4)

A touchpad that outputs a value indicating the degree of contact when contact is detected;
Based on a value indicating the degree of contact output from the touch pad, for each range where contact is detected on the touch pad, a calculation unit that calculates a value indicating the degree of contact in the range;
A holding unit that holds a first threshold for determining a target range to which a process to be executed is assigned, and a second threshold smaller than the first threshold;
Of the ranges in which contact is detected on the touchpad, the number of ranges in which the value calculated by the calculation unit is greater than or equal to a second threshold is less than a predetermined value, the calculation unit calculates When one range whose value is equal to or greater than the first threshold is determined as a target range, and the number of ranges where the value calculated by the calculation unit is equal to or greater than the second threshold is equal to or greater than a predetermined value, determination of the target range is performed A mobile terminal comprising: a determination unit that does not perform the operation. The mobile terminal according to claim 1, wherein the touch pad performs the detection by a change in capacitance. The mobile unit according to claim 1, wherein the determination unit determines, as the target range, a range in which a value calculated by the calculation unit is a maximum value among ranges that are equal to or greater than the first threshold. Terminal. When a contact is detected, an input control program used in a portable terminal including a touchpad that outputs a value indicating the degree of contact,
Based on a value indicating the degree of contact output from the touchpad, a calculation step for calculating a value indicating the degree of contact in the range for each range in which contact is detected on the touchpad;
A holding step for holding a first threshold for determining a target range to which a process to be executed is assigned, and a second threshold smaller than the first threshold;
Of the ranges in which contact is detected on the touchpad, the number of ranges in which the value calculated in the calculation step is greater than or equal to a second threshold is less than a predetermined value, the calculation is performed in the calculation step. When one range whose value is equal to or greater than the first threshold is determined as a target range, and the number of ranges where the value calculated in the calculation step is equal to or greater than the second threshold is equal to or greater than a predetermined value, the target range is determined. An input control program comprising: a determination step that does not perform the step.

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